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A blue dwarf star with an unusual spectrum, Achernar has a magnitude of +0.5, making
it the brightest of the stars of Eridanus, and the ninth brightest in the entire sky.
Bright Achernar lies at the extreme southern tip of the star-river Eridanus, less than a degree from its southernmost border with neighbouring Hydrus.
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π Cephei Polis Pincoya Nashira Adhafera Petra ο1 Cygni Absolutno a Velorum V2306 Ophiuchi θ Hydrae ζ Arae YZ Ceti Xi Boötis B w Carinae x Carinae Sharjah s Velorum A 41 Draconis Struve 2398 A Struve 2398 B β Scupltoris Gakyid Nosaxa b Velorum AX Microscopii HD 37131 Guniibuu GX Andromedae Berehynia FL Virginis Cerberus Diya Dombay e Aquilae Felixvarela Ebla ε Indi Erakis Koeia Koit Kruger 60 A DO Cephei La Superba Kapteyn's Star Copernicus Mekbuda Miram LV Draconis Alkaphrah HR 5546 ι1 Scorpii Naos Alfirk Aspidiske HO Librae ρ Cygni Sargas Azmidi δ Caeli 61 Cygni A Schedar Deneb Mira δ Andromedae Alchiba Ran δ Circini Rigel Mirfak Rastaban Ross 154 Mebsuta Sadr 61 Cygni B χ Cygni 52 Orionis α Centauri A Menkar Arneb Acubens Castor B Suhail Sirius Sirius B U Sagittarii 15 Orionis Lalande 18115 Tureis Gliese 536 WX Ursae Majoris Polaris ο Capricorni B 14 Persei BF Orionis π5 Orionis Betelgeuse Avior γ Pavonis θ Circini τ Ceti β Pictoris Teegarden's Star Unurgunite η Carinae Hatysa EE Leonis Wolf 498 Wolf 359 Wezen Antares W Virginis Capella ν2 Canis Majoris Canopus Almaaz van Maanen's Star Achird HR 7687 Enif Proxima Centauri β Doradus Alnilam BZ Crucis UV Ceti σ Orionis ε Reticuli Alnitak Atria
Achernar
Hertzprung-Russell diagram plotting the temperature and luminosity of Achernar (marked by the red circle) relative to other stars.
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